Preservation of equal time delays for different paths through di

Details Preservation of equal time delays for different paths through di Preservation of equal time delays for different paths through di

1979-02-09

1981-09-01

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370108, H04J 306

Patent

active

042875935

ABSTRACT:
When one time reference distribution node is referenced to another time reference distribution node through a repeater, the same delays are put into signals transmitted from the repeater that are in signals received by the repeater. This is accomplished by introducing variable storage buffers into the paths of signals transmitted from the repeater, and by providing for their control. Since the same delays are added to signals transmitted to a node that are in the signals received from that node, the difference in signal transit times in the two directions of transmission on a duplex transmission path is minimized. Accordingly, the transit time in both directions of transmission between any pair of nodes, which are communicating through the repeater, is essentially the same, and high accuracy is maintained for time reference distribution among the nodes of an electronic network.

REFERENCES:
patent: 3688049 (1972-08-01), Schlichte
patent: 3906159 (1975-09-01), Lutz
patent: 4142069 (1979-02-01), Stover
The Bell System Technical Journal; vol. XXXVIII, No. 4; Jul. 1959, "Resea Model for Time-Separation Integrated Communication", by Vaughn.
Proceedings, IEE; vol. 113, No. 9; Sep. 1966; "Synchronisation of a p.c.m. network using digital techniques", by Mumford et al.

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